Should We Have faith in the Bible???

I was thinking recently as I was reading my bible how easily I take words like “faith” and “love” in the Bible. I tend to think that they have a certain meaning and were highly valued by those who read them, but how can we know this? If you read the early primary sources of those who were attempting to define what it means to be a follower of Christ, they disagreed. So how can we know what it really means to follow Christ in this modern context so far removed from Christ?